Warning: Lost connection to MySQL server during query

Hello,

For testing I create backup manul, after try delete this file I have truble with mysql on my server
(drupal 6.24)

Warning: Lost connection to MySQL server during query query: SELECT r.rid, r.name FROM role r INNER JOIN users_roles ur ON ur.rid = r.rid WHERE ur.uid = 1 in /var/www/.../data/www/my_site/includes/database.mysqli.inc on line 134

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /var/www/.../data/www/my_site/includes/database.mysqli.inc:134) in /var/www/.../data/www/my_site/includes/bootstrap.inc on line 1165

Warning: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111) query: SELECT data, created, headers, expire, serialized FROM cache WHERE cid = 'variables' in /var/www/.../data/www/my_site/includes/database.mysqli.inc on line 134

Warning: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111) query: SELECT * FROM variable in /var/www/.../data/www/my_site/includes/database.mysqli.inc on line 134

Warning: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111) query: UPDATE cache SET data = '', created = 1331546925, expire = 0, headers = '', serialized = 0 WHERE cid = 'variables' in /var/www/.../data/www/my_site/includes/database.mysqli.inc on line 134

Warning: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111) query: SELECT name, filename, throttle FROM system WHERE type = 'module' AND status = 1 AND bootstrap = 1 ORDER BY weight ASC, filename ASC in /var/www/.../data/www/my_site/includes/database.mysqli.inc on line 134

Warning: Cannot modify header information - headers already sent by (output started at /var/www/.../data/www/my_site/includes/database.mysqli.inc:134) in /var/www/.../data/www/my_site/includes/bootstrap.inc on line 729

Warning: Cannot modify header information - headers already sent by (output started at /var/www/.../data/www/my_site/includes/database.mysqli.inc:134) in /var/www/.../data/www/my_site/includes/bootstrap.inc on line 730

Warning: Cannot modify header information - headers already sent by (output started at /var/www/.../data/www/my_site/includes/database.mysqli.inc:134) in /var/www/.../data/www/my_site/includes/bootstrap.inc on line 731

Warning: Cannot modify header information - headers already sent by (output started at /var/www/.../data/www/my_site/includes/database.mysqli.inc:134) in /includes/bootstrap.inc on line 732

Warning: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111) query: SELECT COUNT(pid) FROM url_alias in /var/www/.../data/www/my_site/includes/database.mysqli.inc on line 134